Think we will see a Mac Mini without a disk drive?
Also. Does the Mac Mini output Dolby / True HD audio via HDMI?
Not True HD. It will do Dolby Digital and DTS.
That's one of the reasons I moved to a Windows Based Machine. For $700 I was able to build a machine with a i5 2500k processor, 8gb ram, 2TB drive, case, etc. The machine uses roughly 30 watts which is more than what the mini used but what can you do. The i5 chip is extremely impressive and has handled everything great.
*Note: My soul purpose for this machine was for it to function as an HTPC.*
I do miss having the mini I must admit but if apple does eventually upgrade the line and make something appealing I'll just run FreeNAS or some flavor of linux on this box for media storage and get a mini for xbmc.
I only pushed for this window box because I got a Ceton Quad Cablecard tuner. But that didn't work out so well.